Access is still restricted, making escorted group tours the easiest option for travel.

British citizens do require a tour guide, but this doesn't have to be one approved by the state - which is still the case for Americans, and Britons also have the freedom to use Iran's public transport.

While the visa application process is now much easier, direct-to-local travel platform Evaneos recommends allowing at least 40 days for the lengthy procedure, which requires a visit in person to the embassy in London.

Although Iran continues to be the focus of ongoing controversy, local Evaneos agent Fatemeh, says: "While it is no secret that a number of its neighbouring countries are experiencing varying degrees of instability, Iran itself has remained a very safe place, and there is no reason why tourists should feel that a trip here poses them any sort of threat."

Instead, she says the main challenge facing the country is meeting demand for hotel rooms - although increasingly tours are incorporating homestays.

Regent Holidays has been running trips to Tehran for several years and includes nights in local houses as part of its 14-day Highlights of Northern Iran tour.

In the next 12 months, tourism is set to grow in Iran, and the chances are more tours and flight routes will soon follow.

Tourists can protect themselves while on holiday by taking out travel insurance.

World First is a trading name of Rothwell & Towler (2013) Ltd. Travel insurance premiums and availability of cover may vary depending on individual circumstances. If you are a consumer or business insured you are reminded of your obligations to provide full and accurate information concerning your insurance cover. Further information can be found here. We are an Appointed Representative of Crispin Speers & Partners Ltd who are Authorised and Regulated by the Financial Conduct Authority (FCA). Register number 311507. Rothwell & Towler (2013) Ltd, Registered in England No. 08294942. Registered Office: St Clare House, 30-33 Minories, London EC3N 1PE.